The seals of the Indus Valley Civilisation were made up of:

NCERT (2026-27): “The Harappan seal (Fig.1.1) is possibly the most distinctive artefact of the Harappan or Indus valley civilisation. Made of a stone called steatite, seals like this one often contain animal motifs and signs from a script that remains undeciphered. Yet we know a great deal about the lives of the people who lived in the region from what they left behind – their houses, pots, ornaments, tools and seals – in other words, from archaeological evidence.…”